I went to Yorkshire Sculpture Park again yesterday. It's half term, so it was a great opportunity to immerse my son Freddy in a bit of culture. Also, when I went last week the Jaume Plensa exhibit wasn't fully open to the public, so this was my first chance to see the work inside the Underground Gallery. 50 metre curtain of poetry made of suspended steel letters Jaume Plensa - Yorkshire Sculpture Park 2011 These are breathtaking - and the pictures do not show their ethereal quality There are…